<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./JS/vue.js"></script>
</head>

<body>
    <div id="app">
        {{num1}}
        {{num2}}
        <cpn :number1="num1" :number2="num2" @num1change="num1change" @num2change="num2change"></cpn>
    </div>
    <template id="cpn">
        <div>
            <!-- <input type="text" v-model="dnumber1">1 -->
            <input type="text" :value="dnumber1" @input="num1Input">1
            <input type="text" :value="dnumber2" @input="num2Input">2
            <!-- <input type="text" v-model="dnumber2">2 -->
            <h1>{{dnumber1}}</h1>
            <h1>{{dnumber2}}</h1>
        </div>
    </template>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                num1: 1,
                num2: 0
            },
            methods: {
                num1change(value){
                    this.num1 = parseFloat(value)
                },
                num2change(value){
                    this.num2 = parseFloat(value)
                }                
            },
            components: {
                cpn: {
                    template: '#cpn',
                    props: {
                        number1: Number,
                        number2: Number
                    },
                    data () {
                        return {
                            dnumber1:this.number1,
                            dnumber2:this.number2
                        }
                    },
                    methods: {
                        num1Input(event){
                            this.dnumber1 = event.target.value;
                            this.$emit('num1change',this.dnumber1)
                        },
                        num2Input(event){
                            this.dnumber2 = event.target.value;
                            this.$emit('num2change',this.dnumber2)
                        }
                    }
                }
            }
        })
    </script>
</body>

</html>